Machine for dyeing textile material

ABSTRACT

A TEXTILE DYEING MACHINE OF THE TYPE IN WHICH AN ENDLESS STRING OR ROPE OF THE TEXTILE MATERIAL TO BE DYED IS CIRCULATED IN A CLOSED PATH INCLUDING A JET NOZZLE FED WITH DYE BATH UNDER PRESSURE AND SO SHAPED, THAT THE DYE BATH JET LEAVING THE SAME PULLS ALONG THE TEXTILE ROPE, SEPARATE MEANS BEING PROVIDED TO BRAKE THE TEXTILE ROPE BEFORE ITS ENTRANCE INTO THE ROPE DRIVING JET NOZZLE, CHARACTERIZED IN THAT THE MEANS FOR BRAKING THE TEXTILE ROPE CONSISTS OF A JET NOZZLE FED WITH DYE BATH UNDER PRESSURE AND DIRECTED OPPOSITELY TO THE DRIVING JET NOZZLE.

United States Patent References Cited [72] Inventor OttoAlurSpan Avesta,Sweden XX X H4454 88 8 HH 88 8 66 6 S m mm T a "n N a n E m m T m n A n m P u. n B mmm m I n n m are en I Tflfim m s m w wGFMMF 9 700 N366 77 99999 HHHHH 64425 l1ll. 9015 .25. 8570 67 9 J 22333 91 67 999 ll] 1 i, owmm w 5 '1 8A -ASI o. d 3 mammo flafi AFPP ill-ill. 25231 224333 llllltl [731 Assignee Avestajei'nverks Aktiebolag,a

Primary Examiner-William l. Price Attorney-Fred Philpitt Company of Sweden ABSTRACT: A textile dyeing machine of the type in which an endless string or rope of the textile material to be dyed is cir- AL culated in a closed path including a jet nozzle fed [54] MACHINE FOR D bath under pressure and so shaped, that the dye bath jet leaving the same pulls along the textile rope, separate means being 4 Claims, 5 Drawing Figs.

58/177, provided to brake the textile rope before its entrance into the 58/173, 1 rope driving jet nozzle, characterized in that the means for braking the textile rope consists of a jet nozzle fed with dye bath under pressure and directed oppositely to the driving jet nozzle.

PATENTED Jun 2 819?! SHEET 1 OF 2 FIG. I.

PATENIEU JUN28 I971 SHEET 2 OF 2 FIG. 4.

FIG. 5.

MACHINE FOR DYEING TEXTILE MATERIAL The present invention relates to such machines for dyeing textile material in which an endless string or rope of the textile material is circulated together with the dye bath in a closed bath in which is included a jet nozzle to which the dye bath is supplied under pressure so as to cause a forceful turbulent flow which exerts a pulling action on the textile rope and causes the same to follow the dye bath through the closed circurt.

More particularly the invention is concerned with such textile dyeing machines of the above indicated kind, in which the textile material to be dyed is circulated through an autoclave which is only partly filled with dye bath, and in which the jet nozzle is of venturi type so that the dye ba'th jet leaving the nozzle pulls along the textile rope under a particularly forceful turbulence. A textile dyeing machine of this particular kind is disclosed in principle in U.S. Pat. specification No. 2,978,291.

autoclave. Since as a rule the dyeing process is carried out' under a considerable superpressure it is very difficult to pass the driving shaft of the feeding or braking rollers sealingly out through the wall of the autoclave.

According to the present invention the above mentioned difficulty has been avoided by substituting for the guiding and braking rollers a jet nozzle positioned before the jet noule serving for driving around the textile rope and directed opposite to the latter. By suitably regulating the speed of flow of that branch of the circulating dye liquid which flows through the guiding and braking nozzle it is possible to obtain a braking force of a size suitable for each instance, so that the textile rope enters the main nozzle in a stretched condition and is circulated through the closed path at the desired speed. The braking jet nozzle also assists in causing the dye bath to effectively penetrate into the textile material.

The invention shall now be described more closely with reference to the accompanying drawings, in which:

FIG. 1 diagrammatically shows a jet dyeing machine of known construction,

FIG. 2 shows, on a larger scale and in axial section, a jet nozzle forming part of the machine according to FIG. 1,

FIG. 3 shows a jet dyeing machine made according to the present invention,

FIG. 4 shows in axial section and on a larger scale the braking jet nozzle included in the machine according to FIG. 3 built together with the driving main jet nozzle, and

FIG. 5 shows a modification of the dyeing machine according to FIG. 3.

In FIG. 1 the reference numeral designates a pressure vessel or autoclave in the form of a dyeing cylinder provided with an opening adapted to be closed with a lid 1 1. Said opening permit of placing the textile material in and removing the same from the autoclave.

A tube 12 extends from the bottom of the autoclave to the suction side of a centrifugal pump 13, the pressure side of which is connected to a jet nozzle 17 via a heat exchanger 14 and a pipe containing a regulating valve 16. The jet nozzle 17 consists, as clearly shown in FIG. 2, of a venturi tube 18 into which is inserted from below a tube 19 which is funnel-shaped at its lower end and at its upper end reaches almost onto the restricted portion of the venturi tube, so that an annular nozzle slot 20 is formed between the two tubes. The venturi tube 18 is connected to a transport tube 21 which extends in an arch above the autoclave l0 and opens into the latter at its opposite end.

Below the feed opening of the guide tube 19 are provided three triangularly positioned rollers 22 which can be driven at an adjustable speed from a driving source positioned outside the autoclave. The textile material to be dyed has been joined together to form an endless string or rope 23 which is passed in a loop around'the rollers 22 and extends from the latter up through the jet nozzle 17 and through the transport tube 21.

The autoclave 10 is about half-filled with a dye bath. On starting of the pump 11 the dye bath is sucked from the autoclave l0 and pressed through heat exchanger 14 and pipe 15 into the annular chamber formed between the venturi tube 18 and the guide tube 19, flowing at a high speed out through the annular slot 20 and further through the transport tube 21 back to the autoclave 10. The rapid flow of liquid in the restricted portion of the venturi tube pulls along thetextile rope 23, and at the same time there is created in the restricted zone a forceful turbulence which causes the dye bath effectively to penetrate into the textile material. The textile rope is pulled by the flowing liquid through the nozzle 17 and the transport tube 21 at a velocity which is determined by the speed of rotation of the rollers 22. Said speed is so selected as to cause the rollers to effect a permanent braking action on the textile rope so that the rope enters the jet nozzle 17 in stretched condition.

A guide 24 is provided for guiding the circulating textile rope during its passage through the autoclave.

The above described previously known jet dyeing machine has the inconvenience that it is difficult to sealingly carry out the driving shaft or driving shafts for the braking rollers 22 through the wall of the autoclave. These difficulties have been avoided according to the present invention in a manner shown in FIG. 3 by substituting for the braking rollers a downwardly directed braking jet nozzle.

In the embodiment according to FIG. 3 the braking jet nozzle 25 is built together with the driving jet nozzle 17. The braking jet nozzle 25 is fed with dyeing liquid from a pipe 26 which is branched off from the pipe 15 and contains a regulating valve 27 with the aid of which the velocity of flow of the dye bath and thus also the braking force can be regulated as desired. The shape of the braking jet nozzle is shown more in detail in FIG. 4 in which the downwardly directed venturi tube is designated 28 and the guide tube for the textile rope inserted therein with 29. Below the braking venturi tube 25 may be provided two guides 30 for the textile rope. By suitably adjusting the valve 27 the speed of flow of the dye liquid through the downwardly directed jet nozzle 25 may be regulated to the value which gives the desired braking force on the textile rope 23. The dye bath flowing through the braking nozzle naturally penetrates into the textile material and thus helps in dyeing the same thoroughly.

The embodiment according to FIG. 5 differs from the one shown in FIG. 3 only therein that the autoclave has the form of a U in cross section. In said embodiment a separate guide for that part of the textile rope that passes through the autoclave becomes superfluous, and the volume of the autoclave is considerably reduced.

lclaim:

1. A textile dyeing machine of the type in which an endless string or rope of the textile material to be dyed is circulated in a closed path including a jet nozzle fed with dye bath under pressure and so shaped, that the dye bath jet leaving the same pulls along the textile rope, separate means being provided to brake the textile rope before its entrance into the rope driving jet nozzle, characterized in that the means for braking the textile rope consists of a jet nozzle fed with dye bath under pressure and directed oppositely to the driving jet nozzle.

2. A textile dyeing machine according to claim 1, characterized in that the braking jet nozzle is fed with dye liquid through a regulating valve.

3. A textile dyeingmachine according to claim 1, characterized in that the driving and the braking jet nozzles are fed with dye liquid from a common circulation pump via separate pipe lines.

4. A textile dyeing machine according to claim 1 characterized in that the braking jet nozzle is built directly together with the driving jet nozzle. 

